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- Commonly used for presentations (as well as the disruption of presentations)
- Also used in construction for leveling and measuring
- Available in various colors, most often red and green
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A laser pointer is a hand-held device used to direct a narrow, monochrome (single color) ray of light at a point of interest. The technology is based on the experimental lasers developed in the 1960s, but made commercially available in the 1980s by the innovation of low-cost laser-diode models.
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Safety and Controversy
Though laser pointers were first marketed as a teaching aid, they became a notable hindrance to teaching once low-cost models were available. Since the 1990s, many school campuses have banned them in order to avoid class disruptions, as well as attacks in which a laser is shined into the eyes of the victim. More recently, high-powered models have been banned in New South Wales, Australia, due to a fad for aiming them at airplane cockpits, thus blinding the pilot. Considering the risk of eye damage, laser pointers should not be used as pet toys with cats. -
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Laser Pointer Questions
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How does a laser thermometer work? 2 AnswersThe laser has nothing to do with the thermometer. These thermometers use infrared radiation to measure temperature. The laser is just like a laser sight on a gu... read more -
Is it possible to detect the laser beam on the moon? 2 AnswersLaser Ranging Telescope. http://stardate.org/images/gallery/iotw_20090717.jpg No, it is not possible to detect the beam on the moon by sight, but there is a de... read more -
Laser printable cardboard boxes 3 AnswersThe answer to your question really depends on the printer that you have. Many printers (especially commercial quality printers) clearly list the maximum weight ... read more -
Are laser printers dangerous to your health? 5 AnswersI'm not a doctor, but many people sit next to them or near them, and they usually don't cause too much harm, as long as you are not sticking your nose in them a... read more
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Featured Mahalo Topics
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On Twitter powered by Twitter
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dancing around my house to Eiffel 65 and a laser pointer. i miss the 90's.
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#4: Green 30mw Laser Pointer Pen Style Star Holographic Projector and Laser Pointer-Dual Action http://url4.eu/1M9AV
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#4: Green 30mw Laser Pointer Pen Style Star Holographic Projector and Laser Pointer-Dual Action http://url4.eu/1M9AO
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#4: Green 30mw Laser Pointer Pen Style Star Holographic Projector and Laser Pointer-Dual Action http://url4.eu/1M9AH
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#4: Green 30mw Laser Pointer Pen Style Star Holographic Projector and Laser Pointer-Dual Action http://url4.eu/1M93H
view more tweets...
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